<template>
  <div class="login-container"  >
    <el-form   ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on"
      label-position="left">

      <div class="title-container">
        <h3 class="title">物业管理登录</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input ref="username" v-model="loginForm.username" placeholder="Username" name="username" type="text"
          tabindex="1" auto-complete="on" />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input :key="passwordType" ref="password" v-model="loginForm.password" :type="passwordType"
          placeholder="Password" name="password" tabindex="2" auto-complete="on" @keyup.enter.native="handleLogin" />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-form-item prop="code">
        <span class="svg-container">
          <svg-icon icon-class="code" />
        </span>
        <el-input v-model="loginForm.code" auto-complete="off" placeholder="验证码" style="width: 61%"
          @keyup.enter.native="handleLogin">
          <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img" />
        </div>
      </el-form-item>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
        @click.native.prevent="handleLogin">Login</el-button>

    </el-form>
  </div>
</template>

<script>
  // 导入api/login.js文件
  import {
    getCaptchaCode
  } from '@/api/login.js'

  export default {
    name: 'Login',
    data() {
      // 自定义校验规则
      const validatePassword = (rule, value, callback) => {
        if (value.length < 3) {
          callback(new Error('密码不能小于4位'))
        } else {
          callback()
        }
      }

      return {
        loginForm: {
          username: 'admin',
          password: '123456',
          code: undefined,
          uuid: undefined
        },
        loginRules: {
          username: [{
            required: true,
            trigger: 'blur',
            message: '账号不能为空'
          }],
          password: [{
            required: true,
            message:'密码不能为空',
            trigger: 'blur',
            validator: validatePassword
          }],
          code:[
            {required: true,trigger: 'blur',message: '验证码不能为空'}
          ]
        },
        loading: false,
        passwordType: 'password',
        redirect: undefined,
        codeUrl: ""
      }
    },
    watch: {
      $route: {
        handler: function(route) {
          this.redirect = route.query && route.query.redirect
        },
        immediate: true
      }
    },
    methods: {
      showPwd() {
        if (this.passwordType === 'password') {
          this.passwordType = ''
        } else {
          this.passwordType = 'password'
        }
        this.$nextTick(() => {
          this.$refs.password.focus()
        })
      },
      handleLogin() {
        this.$refs.loginForm.validate(valid => {
          if (valid) {
            this.loading = true
            // 调用vuex中的actions中方法(写的是异步编程模型)
            this.$store.dispatch('user/login', this.loginForm).then(() => {
              // 当前路由地址变为 /
              this.$router.push({
                path: this.redirect || '/'
              })
              this.loading = false
            }).catch(() => {
              // 失败情况，重新加载验证码
              this.getCode()
              this.loading = false
            })
          } else {
            console.log('请填写正确数据!!')
            return false
          }
        })
      },
      getCode() {
        getCaptchaCode().then(resp => {
          this.codeUrl = resp.data
          this.loginForm.uuid = resp.uuid
        })
      }
    },
    created() {
      this.getCode()
    }
  }
</script>

<style lang="scss">
  /* 修复input 背景不协调 和光标变色 */
  /* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

  $bg:#283443;
  $light_gray:#fff;
  $cursor: #fff;

  @supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input {
      color: $cursor;
    }
  }

  /* reset element-ui css */
  .login-container {
    .el-input {
      display: inline-block;
      height: 47px;
      width: 85%;

      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        padding: 12px 5px 12px 15px;
        color: $light_gray;
        height: 47px;
        caret-color: $cursor;

        &:-webkit-autofill {
          box-shadow: 0 0 0px 1000px $bg inset !important;
          -webkit-text-fill-color: $cursor !important;
        }
      }
    }

    .el-form-item {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(0, 0, 0, 0.1);
      border-radius: 5px;
      color: #454545;
    }
  }
</style>

<style lang="scss" scoped>
  $bg:#2d3a4b;
  $dark_gray:#889aa4;
  $light_gray:#eee;

  .login-container {
    min-height: 100%;
    width: 100%;
    background-color: $bg;
    overflow: hidden;

    .login-form {
      position: relative;
      width: 520px;
      max-width: 100%;
      padding: 160px 35px 0;
      margin: 0 auto;
      overflow: hidden;
    }

    .tips {
      font-size: 14px;
      color: #fff;
      margin-bottom: 10px;

      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }

    .svg-container {
      padding: 6px 5px 6px 15px;
      color: $dark_gray;
      vertical-align: middle;
      width: 30px;
      display: inline-block;
    }

    .title-container {
      position: relative;

      .title {
        font-size: 26px;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
      }
    }

    .show-pwd {
      position: absolute;
      right: 10px;
      top: 7px;
      font-size: 16px;
      color: $dark_gray;
      cursor: pointer;
      user-select: none;
    }

    .login-code {
      height: 46px;
      float: right;

      img {
        cursor: pointer;
        vertical-align: middle;
      }
    }

    .login-code-img {
      height: 46px;
    }
  }
</style>
